Singer-actress Miley Cyrus has hit back at Twitter followers who hinted that she has an eating disorder – saying her slender figure is due to food intolerances.

Miley Cyrus hit back at Twitter rumours after posting this snap of her sniffing a bag of fast food (Picture: Xposurephotos.com/Twitter)

The 19-year-old – who previously sparked rumours about her weight when she was snapped out jogging last week in California – fuelled further speculation when she posted a snap of herself on Twitter sniffing a paper bag of fast food.

‘I can’t eat it,’ she told her followers, ‘so I’m just gonna smell the s**t out of it! My mouth is literally watering.’

However Miley’s remarks led to a string of responses from users of the microblogging site accusing her of taking her eating habits to extremes – until she hit back.

‘For everyone calling me anorexic I have a gluten and lactose allergy,’ she insisted. ‘It’s not about weight it’s about health. Gluten is c**p anyway!’

Miley recently sparked rumours about her weight after she was spotted looking thinner than before (Picture: Xposurephotos.com)

Miley went on to suggest that her fans should cut it from their own diets, saying, ‘The change in your skin, physical and mental health is amazing! You won’t go back.’

And the teenager – who is dating Hunger Games star Liam Hemsworth – later sent a tweet to her sister Noah in reference to her diet.

‘U saw how much I ate today at Easter lunch but all of it was healthy and even more fulfilling!’ she tweeted. Health is happiness!’

Miley will return to screens later this summer in the high school comedy LOL, which is due for UK release on June 1.